#1
Which transformation does not change the size or shape of a figure?
Translation
ExplanationTranslation moves each point the same distance in the same direction, preserving size and shape.
#2
What transformation occurs when a figure is flipped over a line?
Reflection
ExplanationReflection involves flipping a figure over a line, changing its orientation.
#3
What is the result of rotating a figure 90 degrees counterclockwise about the origin?
90-degree rotation
ExplanationA 90-degree counterclockwise rotation turns a figure by a right angle.
#4
What transformation occurs when a figure is moved along a straight line without changing its shape or size?
Translation
ExplanationTranslation involves moving a figure along a straight line, preserving its shape and size.
#5
What transformation occurs when a figure is stretched or compressed?
Dilation
ExplanationDilation stretches or compresses a figure, altering its size.
#6
What is the result of rotating a figure 180 degrees counterclockwise?
180-degree rotation
ExplanationA 180-degree rotation turns a figure halfway around, changing its orientation.
#7
Which of the following transformations changes the size of a figure?
Dilation
ExplanationDilation alters the size of a figure without changing its shape.
#8
If a figure is translated 3 units to the right and 4 units down, what is the translation vector?
(4, 3)
ExplanationThe translation vector for this movement is (4, 3), representing the horizontal and vertical shifts.
#9
What is the image of point (2, 3) under a reflection across the x-axis?
(2, -3)
ExplanationReflection across the x-axis negates the y-coordinate, resulting in (2, -3).
#10
What is the image of point (5, -2) under a reflection across the y-axis?
(-5, 2)
ExplanationReflection across the y-axis negates the x-coordinate, resulting in (-5, 2).
#11
What is the name of a transformation that moves each point of a figure the same distance in the same direction?
Translation
ExplanationTranslation preserves size and shape by moving every point the same distance and direction.
#12
Which of the following transformations preserves both distance and angle measures?
Rotation
ExplanationRotation maintains both distance and angle measures, keeping the shape intact.
#13
What is the transformation matrix for a dilation with a scale factor of 2?
[[2, 0], [0, 2]]
ExplanationThe dilation matrix with a scale factor of 2 is [[2, 0], [0, 2]], stretching the figure in both dimensions.
#14
If a figure is rotated 270 degrees counterclockwise about the origin, what are the coordinates of point (3, -4) after the rotation?
(-4, -3)
ExplanationA 270-degree counterclockwise rotation swaps x and y and negates the new x-coordinate, resulting in (-4, -3).
#15
What transformation matrix represents a reflection across the line y = x?
[[0, 1], [1, 0]]
ExplanationThe reflection matrix across y = x is [[0, 1], [1, 0]], swapping x and y coordinates.